Glass-plate holder



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M,499,575 G GLAUDEL GLASS PLATE HOLDER Filedmarch 29. 1923 Patented July l, lZdl.

GEORGE GLAUDEL, O'F LOS ANGELES, CALIFORNIA, ASSIGNOB OF FORITYJJWO AND ONE-HALF PER CENT TO GEORGE L. MTCHELL, 0F SANTA. MONICA, CALIFORNIA, AND FIIFTEEN :PER CENT TO HERVIAN liHLLER, OF SOUTH PASADENA, CALIFORNIA.

GLASS-PLATE HOLDER.

Application led March 29, 1923.

To all whom t may concern:

-lBe it known that I, GEORGE GLAUDEL, a citizen of France, residing at Los Angeles, in the county of Los Angeles and State of California, have invented new and useful lmprovements in Glass-Plate Holders, of whic the following is a specification.

rlt`his invention relates to jigs and fixtures, and has for its object'to provide a glass plate holder to facilitate the grinding of edges of plates of glass to remove their sharpness at the corners.

Another object is to provide a glass plate holder of simple construction, and which enables the rapid assembly or stacking of a number of superposed plates with edges to be ground set up in a common plane. An object is to provide means whereby plates may be stacked in slightly spaced position to permit the entry of a sand blast around corners of the stack of plates that are to be ground oft by the sand blast. Another obj ect is to provide means for yieldingly clamping the plates in stacked position, and which means is adapted to be quickly thrown into and from effective position for conservation of time and labor in use of the jig.

Other objects and advantages will be made manifest in the following specification of an embodiment of the invention illustrated in the accompanying drawings, wherein- Figure 1 is a plan of the jig showing a stack of plates, the holder cover being removed.

Fig. 2 is a vertical, longitudinal section of the jig.

Fig. 3 is a vertical, transverse section of the jig in open position. y

Fig. 4 is an end elevation, parts bi'oken away, the jig being closed.

The present invention consists of a holder having a plane bottom 2 and parallel, perpendicul ar end walls 3, the front and back of the holder being open to permit ready insertion and removal of pieces or plates of glass G, certain corners of which are to be ground off by a sand blast. The end walls 3 are providedl with channels 4 in their inner faces, and into these channels is adapted to be slipped a guide plate 5, having a plane inner face `against which the superposed pieces of glass G may be thrustv so as to bring the contiguous faces into a common plane along the guide plate 5.

Serial vNQ. 628,678.

As each of the plates are superposed, they are preferably spaced a suitable distance, and this is accomplished by the insertion of a spacing sheet 6, which may be of paper or any other suitable material that may be prepared and used at low expense and readily renewed when unduly worn. The front edge of each of the spacing sheets 6 may be recessed at 6a vfor a suitable portion of the length and thus leave shoulders 6b, which can be thrust against the guide plate 5 for proper positioning.

For effective and quick utilization of the jig in the sand blasting of the plate edges, these are preferably uniformly stacked so that their ends will be in an approximately common plane, and for this purpose the endv walls 3 of the holder are provided with inwardly extending jack screws 7, the inner ends of which are turnably mounted in end blocks 8, adjustable inwardly from the walls 3 so as to form end guides for the glass plates.

After a stack of pieces of glass has been built up in the holder, the guide plate` 5 is removed from its channels 4 and a prcssurr-z device is lowered'down into clamping position upon the topmost piece of glass. Such a clamping means includes a pressure-head 10 of somewhat less dimensions than the glass pieces being operated upon. This pressurehead is provided with one or more pins 11 surrounded by compressed springs 12, and which pins pass through a swinging leaf 13 which is hingedly connected at 14 to the rear corners of the end walls 3, so that the leaf 'can be thrown upwardly to an open position, clearly shown in Figure 3, in which it is maintained by abutment shoulders 15, associated with the hinge 14.

The pressure head 10 is attached to the top forming leaf 13 by means of a connecting rod 16 passing through the leafand being attached to a lever 17, which is pivoted at 13a on a bracket provided on the leaf 13. The holder is provided with upwardly projecting pins or stops 8a downagainst which the leaf 13 may be turned.

rl`he lever 17 is provided with a ratchet pawl 18, and this is adapted to lock the lever 17 in aposition holding the pressure-head 10 drawn toward the leaf 13, and thus com pressing the springs 12 and a spring 12a which surrounds the connecting rod 1.6. The

pawl 18 is engageable with the shank 19 of a handle 20, iixedly provided on the leaf 13,

and which shank has a ratchet shoulder 19a" il vthe leaf 13, and to prevent this from being sprung back, a fastening hook 21 is pivotally mounted at 22 on each of the end walls k3 vof the holder; these hooks being adapted to engage lugs -`23 provided to receive the same on the ends of the leaf 13. As the head is pressed down upon the stack of glass pieces, the pawl 18 becomes disengaged from the handle shoulder 19a and, after the leaf 13 has been --hooked in position, the springs 1.2--12a firmly hold the glass plates in their stack with the front aligned edges exposed to be subjected to the sand blast from any suitable instrument. The action of the sand blast is to round of the front spaced corners of the sta-ck of fhandle 17 toward the handle 20, thus lifting the pressure-head `from the stack of glass pieces, and latches the retracted head by the pawl 18. Then the hooks 21 are tripped and the leaf with the attached pressure-head thrown open.

Further embodiments, modifications and variations may be resorted to within the principle of the invention.

What is claimed is:

1. In a jig for lining up and holding pieces of plate glass in a stack, a holder having a bottom upon which the pieces are stacked one above the other, end guide means for the ends of the pieces and a removable front guide `plate against which the pieces are positioned in alignment in the stack, and means for clamping the stack of pieces whereby to hold the same when the front guide plate has been removed to expose the aligned edges of the plates to be sand blasted.

2. In a `for lining up and holding pieces of plate glass in a stack, a holder having a bottom upon which the pieces are stacked one above the other, end guide means v for the ends of the pieces and a removable front guide plate against which the pieces are positioned in alignment in the stack, and means for clamping the stack of pieces whereby tohold the same when the front guide plate has been removed to expose the alignededges of the plates to be sand blasted, the holder having guide portions in which the is mounted.

3. In a jig for lining up and holding pieces of plate glass in a stack, a holder having a bottom upon which the pieces are stacked one above the other, end guide means for the ends of the pieces and a removable front guide plate against which the pieces are positioned in alignment in the stack, and yieldable means for clamping the stack of pieces whereby to hold the same when the front guide plate has been removed to expose the aligned edges of the plates to be sand blasted.

4i. In a jig for lining up and holding pieces of plate glass in a stack, a holder having a bottom upon which the pieces are stacked one above the other, end guide means for the ends of the pieces and a removable front guide plate against -which the pieces are positioned in alignment in the stack, and means for clamping the stack of pieces whereby to hold the same when the front guide plate has been removed to expose the aligned edges of the plates to be sand blasted, said means including a foldable top leaf to which is yieldably attached a pressure-head adapted to be forced down upon the stacked pieces.

5. In a jig for lining up and holding pieces of plate glass in a stack, a holder having a bottom upon which the pieces are stacked one above the other, end guide means for the ends of the pieces and a removable front guide plate against which the pieces are positioned in alignment in the stack, means for clamping the stack of pieces whereby to hold the same when the front guide plate has been removed to eX- pose the aligned edges of the plates to` be sand blasted, said means including a foldable top leaf to which is yieldably attached a pressure-head adapted to be forced down upon the stacked pieces, and means for latching the leaf in closed position with the head bearing on the stacked pieces.

6. In a jig for lining up and holding pieces of plate glass in a stack, a holder having a bottom upon which the pieces are stacked one above the other, end guide means for the ends of the pieces and a removable front guide plate against which the pieces are positioned in alignment in the stack, means for clamping the stack of pieces whereby to hold the same when the front gui-de plate has been removed to expose the aligned edges of the plates to be sand blasted, said means including a foldable topleaf to which is yieldably attached a pressure-head adapted to be forced down upon the stacked pieces, and a latch means for holding the pressure head in retracted position on the withdrawn leaf.

7. In a jig for lining up and holding pieces of plate glass in a stack, a holder guide plate detachably having a bottom upon Which the pieces are the front guide plate has been removed to stacked one above the other, end guide expose the aligned edges of the plates to means for the ends of the pieces and a rebe sand blasted, said end guide means in- 101 movable front guide plate against which clnding adjustable end blocks.

5 the pieces are positioned in alignment in the In testimony whereof I have signed my stack, and means for clamping the stack name to this speeiiieation. of pieces whereby to hold the same when GEORGE GLAUDEL. 

